The squishy toys are also collectable – as you don't know what colour dumpling you will receive before buying one. Like other viral toys, Mystery Squishy Dumplings are becoming increasingly difficult to track down, with retailers selling out within hours of restocking. Medical experts have also issued warnings of the dangers of a trend for heating ‘squishy’ toys in the microwave after several children suffered serious burns. The warning comes as several parents have sued makers of these toys after their children have been seriously injured or died. The product does not meet the requirements of the Toys (Safety) Regulations 2011.'